In 1997, Middleton wrote the one-person play, Miracle Mile, about his lifelong struggle with juvenile rheumatoid arthritis.
He also played a recurring character known as Edward Markham, a rare book dealer, in the science-fiction series, Fringe.
Middleton appeared as a recurring cast member on The Blacklist in which he played Glen Carter, a DMV worker who moonlights as a tracker.
[2] Following Middleton's death, his character Glen also died of West Nile virus in The Blacklist (season 8) episode 6, "The Wellstone Agency."
Born Clark Tinsley Middleton on April 13, 1957, in Bristol, Tennessee, he grew up in Tucson, Arizona.
[2] Middleton died of complications from West Nile virus on October 4, 2020, at Cedars-Sinai Medical Center.